Whitney Houston's memorabilia fetched more than $80,000 at an auction in Beverly Hills Photo: Reuters

I Will Always Love You, Whitney Houston's cover of Dolly Parton's hit single, is currently the most downloaded song on iTunes.

Sales of the song shot up on Saturday after the pop diva was announced dead in her Los Angeles hotel room. The cause of death is still unclear.

I will always love you, was first released by Dolly Parton as a country track in 1974 and reached the number one spot of the Billboard Hot Country Songs chart. In 1992, Whitney Houston recorded the song for the Grammy-award-winning soundtrack of The Bodyguard. It became a worldwide hit reaching number 68 of the Billboard's Greatest Songs of All Time.

Whitney Houston songs have rocketed on the iTunes Top 100 Chart. Other songs that have featured include: I Wanna Dance With Somebody, How Will I Know, Greatest Love of All, One Moment in Time, The Star Spangled Banner, Didn't We Almost Have It All, I Have Nothing, Where Do Broken Hearts Go, I'm Every Woman, Saving All My Love For You, I Look to You, Run to You, It's Not Right But It's Okay, Exhale (Shoop Shoop), You Give Good Love, and Heartbreak Hotel.

Houston, 48, was found dead in a bathtub in a fifth-floor suite at the Beverly Hilton Hotel on Saturday. The cause of her death is unclear and is unlikely to be revealed anytime soon. Coroner's officials have said they will not release the results of the singer's autopsy as police detectives continue to investigate the death.

There were no indications of foul play, but rumors surrounding her death signal to the possibility of an overdose of prescription drugs. Houston has battled with drug and alcohol abuse for years.

Houston's body has been brought back to her home town of Newark, New Jersey. Her funeral will be held at the New Hope Baptist Church on Saturday, where she showcased her childhood talent, according to the Chicago Tribune. The funeral service will be invitation only, in order to protect the families' privacy.